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UNITED STATES PATENT ITEICE.

JOHANN BONGARDT, OF NEW YORK, N. Y., ASSIGNOR TO HIMSELF AND L.

Y H. GOHN, OF 'SAME PLACE.

PROQESSVAND COMPOSITION FOR PRINTING THE GRAIN 0F WOOD.

Specification forming part of Letters Patent No. 84,728, dated December8, 1868.

To all 'whom it may concern:

Be it known that I, JOHANN BONGARDT, of the city, county, and State ofNew York,have invented a new and Improved Method of Imprinting the Grainof Wood on Paper or other Substance; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, which willenable others skilled in the art to make and use the same, referencebeing had to the accompanying drawing, forming part of thisspecification.

The drawing represents a face View of a piece of paper provided with awood-grain print.

This invention relates to a new process for producing on paper and othermaterial a beautiful imitation of the various grained woods; andconsists in so treating the planed surface of a piece of grained woodthat it can itself be used as block for copying its grain with greataccuracy upon the paper. In this manner the most exquisiteimitation-wood paperhangings, and even imitation veneers, can beproduced at a t-riiing expense.

The block to be used for printing is rst planed and smoothed on theprinting-surface. A composition consisting of the following ingredients,in variable proportions, is now applied to the surface of the block:Linseedoil, brown japan, litharge, white soap, and water.

t This composition acts as an etch or corrosive, to soften the softparts of the wood, to

makevthem spongy, while it will not be so apt to affect the hard partsof the Wood.

With the composition is mixed the coloringmatter, all of-which, with thecomposition, is soaked into the wood.

The wood is now pressed iu a suitable machinery, and in this compressedstate is made to print upon the paper or other material.

The hard parts of the wood, which did not retain the coloring-matter, donot print at all, While the softest parts, which contain most color,make the darkest impressions. parts not very soft, and not quite hard,make lighter shades, and thus a perfect-ly true image of the grain willbe printed upon the paper.

The composition is varied with the wood, as some ingredients, or theirgreater or less quantity, will have a different effect on differentkinds of wood.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The method herein described of preparing wood to cause it to printits veneer or grain on paper or other material, as set forth.

2. The composition herein described for treating wood, for the purposeset forth.

J. BONGARDT.

TVitnesses:

WM. F. MGNAMARA, ALEX. F. ROBERTS.

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